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Igmp streaming issue in the network

Latest reply: Nov 11, 2019 01:55:45 404 5 2 0

Problem Description:

 

IGMP streaming issue in the networkchannel freeze for some time randomly then go normal.

IGMP source/ Feed is coming in the vlan 464 in core switch and then we are using different vlans for different floors.

 

IGMP server vlan: 464   …… IGMP source is ISP connected to port GE 1/1/0/10

User/IPTV vlans: 399 to 461.

 

 

TOPOLOGY IS LIKE THAT,

 

IGMP SOURCE IS COMING------------àCORE SWITCH (VLAN:464) --------------------à Edge Switches IDF STACK-------à ROOM Side Switch.


1


Problem Analysis:

 

1.       Login the S5700 and  found  the CPCAR packet drop by  running commanddisplay lsw slot X showdropcntcheck  the  output Field CPU code rate limiter Drop Cnt,there are  some packets  dropped  by CPCAR

Screenshot

Screenshot


2Modify the CIR parameter  from 64  to 256and you  can check the  result by  running command display cpu-defend configuration all

Configuration command  as  follow

Example of change to 256 

#

Cpu-defend policy igmp

  Car packet-type igmp cir 256

Cpu-defend-policy igmp

Cpu-defend-policy igmp global

#

4

5


3- Login the Core switch, and  check the information about member ports of multicast group. Sometimes there is no output, but sometimes  we can  see some normally  display information

6


4- Run command  display igmp-snooping router-port v  ,to check the  IGMP route port information ( IGMP source ) ,   found the route port is GE1/1/0/10

Then run  command “display interface GE1/1/0/10” to check the interface state, we found the port  was UP/Down

7

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5- check  log buffer, double confirm that the GE1/1/0/10 was UP  /Down .... The service is from ISP so need to check ISP side .


Root Cause:

1.Route port GE 1/1/0/10 physical link issue, core switch cannot receive IGMP General Query messages from the IGMP  source  side normally ( ISP ) .

2.CPCAR value is small

 

 

Solution Description:

1-      Check the GE 1/1/0/10 physical link, make sure the port can keep  UP

2-      Change the S5700 switches  CIR  from 64 to  256

 



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semphis
Created Sep 23, 2019 14:40:24 Helpful(0) Helpful(0)

How did you find out what CPCAR drops are?
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Mohamed_Mostafa
Created Sep 23, 2019 17:21:56 Helpful(0) Helpful(0)

Posted by semphis at 2019-09-23 08:40 How did you find out what CPCAR drops are?
Screenshot


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Network%20%26%20Security%20Engineer
semphis
Created Sep 25, 2019 09:11:10 Helpful(1) Helpful(1)

Igmp streaming issue in the network-3068379-1 thank you :)
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Mohamed_Mostafa
Created Sep 26, 2019 07:44:34 Helpful(0) Helpful(0)

Welcome dear
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Network%20%26%20Security%20Engineer
welisson_br
Created Nov 11, 2019 01:55:45 Helpful(0) Helpful(0)

Hi, guys.

I am facing this same issue, so, I've tried to increase the cpcar but no successful, I still can see this issue in my switch, would you have any other suggestion ?
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